AlarmClock persistent

Hello all,
In my project I would like to use the AlarmClock example, but I wonder how to remember the data so that it does not disappear after turning off the power,
So far, I have not used data storage.

You would need to use persistence and then restore the values using restoreOnStartup. My question though is how you setup your alarm clock? If you use a time based Cron rule, you just have to set it up once and you won’t need persistence for it.

I want to use data storage because the crone rule does not allow changing from the interface
Unfortunately, I have no experience with data persistence and I have a big problem with it,